A Linux privilege-escalation proof-of-concept exploit has been published that, according to the bug hunter who developed it, typically works effortlessly on kernel versions between at least 5.14 and 6.6.14.  Running the exploit as a normal user on a vulnerable machine will grant you root access to the box, allowing you to do whatever you want on it. This can be used by rogue insiders or malware already on a computer to cause further damage and problems.

Source: The Register